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Hi all - noticed that I had the usual symptoms of a broken/weak coolant pump (had the same with my CLS55) so ordered a new coolant pump and got around to fitting it today.
Found out that the Bosch pump had already been fitted but the wiring had been changed! The original wire had been cut at the plug and a new wire has been spliced into a loom, I have no idea why. I traced the wires back up to the loom and found this under the wiring compartment in the engine bay...any idea why anyone would have done this? I'm not sure what wires they've spliced into.
What's the best way to test if the pump is receiving power? On my CLS55 it would run for about a minute or so when ignition was switched on but this doesn't seem to be happening with the SL? Is it meant to? I want to make sure that the wiring is fine before fitting the new pump. Any ideas.....?
I did think that, have since put a voltmeter on the wires and there's nothing with ignition on - I did hear the pump kick on for a few seconds once when the engine was running but then it just stopped
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
